Machine tool and control device for managing a usage time of a tool

A machine tool system comprising:

• a machine tool comprising:
• a first workpiece main spindle device;
• a second workpiece main spindle device;
• a tool main spindle device configured to:
• execute, by an exchangeable main spindle head tool, machining of a first system in the first workpiece main spindle device configured to rotationally hold a workpiece;
• and
• execute, by the exchangeable main spindle head tool, machining of a second system in the second workpiece main spindle device configured to rotationally hold the workpiece;
• and
• a control device including a processor and a memory wherein:
• the control device is configured to drive control of the first and second workpiece main spindle devices and the tool main spindle device;
• the memory comprises a first tool management data and a second tool management data;
• and
• the processor is configured to:
• calculate a total usage time of the main spindle head tool based on the machining of the first system or the machining of the second system executed in the tool main spindle device;
• store the calculated total usage time in the first tool management data or second tool management data;
• and
• rewrite the same total usage time in the other of the second tool management data or the first tool management data.